The place where the sporangium of a fern burs | vedclass

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(C) The $Stomium$ is a specialized region of the sporangium wall consisting of thin-walled,radially elongated cells. When the sporangium matures and d

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Stomium

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(C) The $Stomium$ is a specialized region of the sporangium wall consisting of thin-walled,radially elongated cells. When the sporangium matures and dries,the $Annulus$ (a row of thick-walled cells) contracts,causing the $Stomium$ to rupture or burst open,thereby releasing the spores. Therefore,the $Stomium$ acts as the site of dehiscence for the sporangium.

The place where the sporangium of a fern bursts open is called:

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